title: Phase-shift interference-based wavefront characterization for orbital angular momentum modes.
abstract: Wavefront characterization for orbital angular momentum (OAM) modes is demonstrated using quadrature phase-shift interference. The phase fronts and intensity profiles of OAM(-2), OAM(-4), OAM(-6), and OAM(-8) are measured. Wavefront correlations between the experimental results and the pure Laguerre-Gaussian modes are calculated to evaluate the measurement. The measured results are in reasonable agreement with the anticipated results based on simulations.
authors.affiliation: Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA. haoh@usc.edu
authors.forename: Hao
authors.initials: H
authors.lastname: Huang
authors.forename: Yongxiong
authors.initials: Y
authors.lastname: Ren
authors.forename: Yan
authors.initials: Y
authors.lastname: Yan
authors.forename: Nisar
authors.initials: N
authors.lastname: Ahmed
authors.forename: Yang
authors.initials: Y
authors.lastname: Yue
authors.forename: Amanda
authors.initials: A
authors.lastname: Bozovich
authors.forename: Baris I
authors.initials: BI
authors.lastname: Erkmen
authors.forename: Kevin
authors.initials: K
authors.lastname: Birnbaum
authors.forename: Sam
authors.initials: S
authors.lastname: Dolinar
authors.forename: Moshe
authors.initials: M
authors.lastname: Tur
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner